nixos/modules/home/gaming.nix

{
  pkgs,
  lib,
  myConfig,
  ...
}: let
  gamingMonitor = "DP-1";

  gaming-focus = pkgs.writeShellScriptBin "gaming-focus" ''
    # If already on gaming workspace on the gaming monitor, go back
    current=$(${pkgs.hyprland}/bin/hyprctl activeworkspace -j | ${pkgs.jq}/bin/jq -r '.name')
    focused=$(${pkgs.hyprland}/bin/hyprctl monitors -j | ${pkgs.jq}/bin/jq -r '.[] | select(.focused) | .name')
    if [[ "$current" == "gaming" && "$focused" == "${gamingMonitor}" ]]; then
      ${pkgs.hyprland}/bin/hyprctl dispatch workspace previous
      exit 0
    fi

    # Close special workspace on gaming monitor if open
    special=$(${pkgs.hyprland}/bin/hyprctl monitors -j | ${pkgs.jq}/bin/jq -r '.[] | select(.name == "${gamingMonitor}") | .specialWorkspace.name')
    if [[ -n "$special" ]]; then
      # Gaming workspace is already underneath — just close the special overlay
      ${pkgs.hyprland}/bin/hyprctl --batch "dispatch focusmonitor ${gamingMonitor};dispatch togglespecialworkspace ''${special#special:}"
    else
      ${pkgs.hyprland}/bin/hyprctl --batch "dispatch focusmonitor ${gamingMonitor};dispatch workspace name:gaming"
    fi
  '';

  game-focus-watcher = pkgs.writeShellScriptBin "game-focus-watcher" ''
    handle() {
      case $1 in
        openwindow*)
          data="''${1#openwindow>>}"
          class=$(echo "$data" | cut -d',' -f3)
          if [[ "$class" =~ ^steam_app_[0-9]+ ]] || \
             [[ "$class" == "gamescope" ]] || \
             [[ "$class" =~ ^wine- ]] || \
             [[ "$class" == "lutris" ]] || \
             [[ "$class" == "heroic" ]]; then
            special=$(${pkgs.hyprland}/bin/hyprctl monitors -j | ${pkgs.jq}/bin/jq -r '.[] | select(.name == "${gamingMonitor}") | .specialWorkspace.name')
            if [[ -n "$special" ]]; then
              # Gaming workspace is already underneath — just close the special overlay
              ${pkgs.hyprland}/bin/hyprctl --batch "dispatch focusmonitor ${gamingMonitor};dispatch togglespecialworkspace ''${special#special:}"
            else
              ${pkgs.hyprland}/bin/hyprctl --batch "dispatch focusmonitor ${gamingMonitor};dispatch workspace name:gaming"
            fi
          fi
          ;;
      esac
    }

    ${pkgs.socat}/bin/socat - "UNIX-CONNECT:$XDG_RUNTIME_DIR/hypr/$HYPRLAND_INSTANCE_SIGNATURE/.socket2.sock" | while read -r line; do
      handle "$line"
    done
  '';

  # Games that should have `stayfocused` applied (to avoid multi-monitor focus issues)
  stayFocusedGames = [
    # "Deadlock"
    # "project8"
    # "citadel"
  ];

  mkGameRules = selector: [
    "monitor ${gamingMonitor}, ${selector}"
    "fullscreen, ${selector}"
    "immediate, ${selector}"
    "tile, ${selector}"
  ];

  stayFocusedRules = lib.flatten (map (
      game: [
        "stayfocused, title:^(${game})$"
        "stayfocused, class:^(${game})$"
      ]
    )
    stayFocusedGames);
in {
  home.packages = with pkgs; [
    protonup-qt
    protontricks
    mangohud
    gaming-focus
    game-focus-watcher
    # via
  ];

  programs.mangohud = {
    enable = true;
    settings = {
      full = true;
      no_display = true; # Don't show by default (toggle with Shift+F12)
      cpu_temp = true;
      gpu_temp = true;
      ram = true;
      vram = true;
    };
  };

  wayland.windowManager.hyprland.settings = {
    workspace = [
      "name:gaming, monitor:${gamingMonitor}, default:true"
    ];

    exec-once = [
      "[workspace special:steam silent] uwsm app -- steam"
      "game-focus-watcher"
    ];

    bindd = [
      "SUPER, A, Toggle Steam, togglespecialworkspace, steam"
      "SUPER SHIFT, A, Move to Steam Special Workspace, movetoworkspace, special:steam"
      "SUPER, G, Switch to Gaming Workspace, exec, gaming-focus"
      "SUPER SHIFT, G, Move to Gaming Workspace, movetoworkspace, name:gaming"
    ];

    windowrulev2 =
      [
        "plugin:hyprbars:nobar, class:^(steam)$"
        "plugin:hyprbars:nobar, class:^(steam_app_\\d+)$"

        # --- STEAM GENERAL RULES ---
        # Default ALL steam class windows to float. This catches all dialogs & properties windows.
        "float, class:^(steam)$"
        # Suppress focus stealing from dialogs/etc.
        "noinitialfocus, class:^(steam)$"
        "suppressevent activate fullscreen maximize, class:^(steam)$"

        # --- STEAM CLIENT OVERRIDE ---
        # Override the float for the main Steam client, tile it, and move it to the special workspace.
        "tile, class:^(steam)$, title:^(Steam)$"
        # All steam class windows go to special:steam (dialogs, store, friends, etc.)
        # Game overrides below take precedence for actual games.
        "workspace special:steam, class:^(steam)$"

        # --- STEAM GAME OVERRIDES ---
        # Override the float for actual games and move them to the gaming workspace.
        # 1. Auto-detected steam_app games (like Deadlock).
        "monitor ${gamingMonitor}, class:^(steam_app_\\d+)$"
        "tile, class:^(steam_app_\\d+)$"
        "fullscreen, class:^(steam_app_\\d+)$"
        "immediate, class:^(steam_app_\\d+)$"
        "workspace name:gaming, class:^(steam_app_\\d+)$"

        # 2. Behavior-detected manual games (e.g. ARC Raiders).
        # This moves any steam game to the gaming workspace and tiles it when it becomes fullscreen.
        "tile, class:^(steam)$, fullscreen:1"
        "workspace name:gaming, class:^(steam)$, fullscreen:1"
      ]
      # Other auto-detected non-steam games
      ++ (mkGameRules "class:^(gamescope)$")
      ++ (mkGameRules "class:^(lutris)$")
      ++ (mkGameRules "class:^(heroic)$")
      ++ (mkGameRules "class:^wine-.*$")
      ++ (mkGameRules "title:^Wine .*$")
      ++ (mkGameRules "initialTitle:^(?i)godot.*$")
      # ++ [
      #   "monitor 0, initialTitle:^(?i)godot.*$"
      #   "fullscreen, initialTitle:^(?i)godot.*$"
      #   "tile, initialTitle:^(?i)godot.*$"
      # ]
      # Stayfocused rules
      ++ stayFocusedRules;
  };
}